The Research Of Aerial Radio Monitoring System Error

In recent years,the radio enterprise has been developed rapidly,a lot of radio stations have been established,many new communication technologies have been used,which have make electromagnetic wave order become more and more complicated.The dedicated communication channels of government,water conservancy,public security and other important social institution were disturbed by unknown signals many times every year, so to strengthen the supervision of the air electromagnetic wave has become a major problem to be solved. The traditional ground monitoring system is easy to be jammed by tall buildings, metal facilities, man-made electromagnetic noise and other error factors,so the monitoring system effect is poor, and exist monitoring blind angles. The aerial radio monitoring system could avoid ground interferential factors effectively,get high location,direction finding precision,so in-depth study error factors is helpful to upgrade aerial radio monitoring system,and make the monitoring accuracy better.This paper mainly studied on the amplitude-comparison method aerial radio monitoring system error and phase-difference method aerial radio monitoring system error on the basis of "The research on the aerial radio monitoring platform technology and method of Yunnan province" project test. For the amplitude-comparison method aerial radio monitoring system error,this paper analysed the influence of the principle error, the airship factor, signal attenuation, polarization error, man-made error, electromagnetic noise on monitoring accuracy based on the test data, and put forward a reasonable solution to improve the monitoring accuracy, and reduce the influence of error factors at largest extent.For the phase-difference method aerial radio monitoring system error, this paper theoretically analysed the error causes of direction finding and positioning.In the direction finding part, this paper analyzed the influence of many parametric deviations on the direction finding accuracy. In the positioning part, this paper analyzed the influence of platform height, platform speed, back dip angle deviation, back dip angle deviation rate, azimuth angle deviation and azimuth angle deviation rate on the positioning accuracy,and referenced many literatures to introduce coordinate transformation solution to improve the monitoring accuracy.This paper theory provides scientific and rational reference to radio management departments to build high-precision aerial radio monitoring system,and decrease monitoring error at largest extent.